Colloquium Schedule

Colloquium: Thursday, October 22nd, 4:25 PM, Via Zoom

What can we learn from heavy neutron stars?” By Dr. Jacquelyn Noronha-Hostler- University of Illinois. 

The observation of gravitational waves from a blackhole-mystery object binary opens the possibility for heavy neutron stars of 2.5 solar masses (potentially seen in GW190814). If this mystery object is a neutron star of 2.5 solar masses, it poses direct challenges to models of the equation of state. Interestingly, introducing non-trivial structure in the speed of sound sourced by changes in the degrees of freedom (possibly quarks) of ultra-dense matter can resolve this conflict, which may have large ramifications in nuclear and astrophysics. However, for a clear smoking gun signature of the mystery object being a neutron star, one requires a measurement of the tidal deformability that is non-zero. Because the predicted values are very small, a tenfold increase in sensitivity may be needed to test this possibility with gravitational waves, which is feasible with third generation detectors.

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Physics and Astronomy Colloquia are usually scheduled for Thursdays at 4:25 PM via Zoom.If you would like to attend from outside Lehigh,  please contact Prof.  J. Toulouse ( for the passcode to the meeting


Physics Colloquium Schedule for Fall 2020

Click on Title below for past or upcoming Announcements (where available), and Speaker name for website.        

September 3---
September 10Brian SwingleUniversity of Mary LandEntangled Butterflies: Chaos in Complex Quantum Systems
September 17Jared KaplanJohn HopkinsNeural Scaling Laws and GPT-3
September 24---
October 1---
October 8Eugene DemlerHarvardNew Perspectives on Quantum Matter: Bringing Together Quantum Simulations and Machine Learning
October 15Kei-Mei FuUniversity of WashingtonSynthesis and characterization of quantum defects: from deep centers in diamond to shallow impurities in ZnO
October 22Jaki Noronha-HostlerUniversity of Illinois What can we learn from heavy neutron stars?
October 29---
November 5Jennifer RossSyracuse University -
November 12Matt Sievert--
November 19Jerome LiciniLehigh University-
December 3Vijay ShenoyIndian Institute of Science-